Karena kurangnya kejelasan dalam pertanyaan, saya menemukan empat solusi berbeda. Solusinya berbeda pada:
- Apakah Anda akan "terjun" per jawaban Chris
- Ketika Anda memiliki tanggal tertutup, apakah Anda menggunakan tanggal paling awal untuk grup itu atau tanggal mulai untuk catatan yang ditutup.
Harap dicatat ini dilakukan dalam SQL Server, bukan MySQL. Selain beberapa perubahan sintaks yang sangat kecil, itu harus bekerja sama.
Pengaturan umum dan data sampel untuk keempat metode
CREATE TABLE #example
(
id int NOT NULL DEFAULT '0',
borrower_id int NOT NULL,
started datetime NULL DEFAULT NULL,
closed datetime NULL DEFAULT NULL,
dead datetime NULL DEFAULT '0000-00-00 00:00:00'
);
CREATE TABLE #result
(
borrower_id int NOT NULL DEFAULT '0',
started datetime NULL DEFAULT NULL,
ended datetime NULL DEFAULT NULL
);
INSERT INTO #example
(id, borrower_id, started, closed, dead)
VALUES
(7714,238846,'2015-01-27 15:14:50','2015-02-02 14:14:13',NULL),
(7882,238846,'2015-01-28 13:25:58',NULL,'2015-05-15 12:16:07'),
(13190,259140,'2015-03-17 10:11:44',NULL,'2015-03-18 07:31:57'),
(13192,259140,'2015-03-17 10:12:17',NULL,'2015-03-18 11:46:46'),
(13194,259140,'2015-03-17 10:12:53',NULL,'2015-03-18 11:46:36'),
(14020,259140,'2015-03-23 14:32:16','2015-03-24 15:57:32',NULL),
(17124,242650,'2015-04-16 16:19:08','2015-04-16 16:21:06',NULL),
(19690,238846,'2015-05-15 13:17:31',NULL,'2015-05-27 13:56:43'),
(20038,242650,'2015-05-19 15:38:17',NULL,NULL),
(20040,242650,'2015-05-19 15:39:58',NULL,'2015-05-21 12:01:02'),
(20302,242650,'2015-05-21 13:09:06',NULL,NULL),
(20304,242650,'2015-05-21 13:09:54',NULL,NULL),
(20306,242650,'2015-05-21 13:10:19',NULL,NULL),
(20308,242650,'2015-05-21 13:12:20',NULL,NULL),
(21202,238846,'2015-05-29 16:47:29',NULL,NULL),
(21204,238846,'2015-05-29 16:47:56',NULL,NULL),
(21208,238846,'2015-05-29 17:05:15',NULL,NULL),
(21210,238846,'2015-05-29 17:05:55',NULL,NULL),
(21918,242650,'2015-06-04 17:04:29',NULL,'2015-06-12 15:47:23');
1. CASCADING - MENGGUNAKAN solusi RECORD TERTUTUP
Ini adalah solusi yang saya yakin penanya sedang mencari & mencocokkan hasilnya.
select *
into #temp1
from #example
while (select count(1) from #temp1)>0
begin
--Grab only one user's records and place into a temp table to work with
declare @curUser int
set @curUser=(select min(borrower_id) from #temp1)
select *
into #temp2
from #temp1 t1
where t1.borrower_id=@curUser
while(select count(1) from #temp2)>0
begin
--Grab earliest start date and use as basis for 15 day window (#2 rule)
--Use the record as basis for rules 3 and 4
declare @minTime datetime
set @minTime=(select min(started) from #temp2)
declare @maxTime datetime
set @maxTime=@minTime
declare @curId int
set @curId=(select min(id) from #temp2 where started=@minTime)
select *
into #temp3
from #temp2 t2
where t2.id=@curId
--Remove earliest record from pool of potential records to check rules against
delete
from #temp2
where id=@curId
--Insert all records within 15 days of start date, then remove record from pool
while (select count(1)
from #temp2 t2
where t2.started<=DATEADD(day,15,@maxTime)
or t2.closed<=DATEADD(day,15,@maxTime)
or t2.dead<=DATEADD(day,15,@maxTime) )>0
begin
insert into #temp3
select *
from #temp2 t2
where t2.started<=DATEADD(day,15,@maxTime) or t2.closed<=DATEADD(day,15,@maxTime) or t2.dead<=DATEADD(day,15,@maxTime)
delete
from #temp2
where started<=DATEADD(day,15,@maxTime) or closed<=DATEADD(day,15,@maxTime) or dead<=DATEADD(day,15,@maxTime)
--set new max time from any column
if (select max(started) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
if (select max(closed) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
if (select max(dead) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
end
--Calculate end time according to rule #3
declare @end datetime
set @end = null
set @end=(select min(closed) from #temp3)
if @end is not null
begin
set @minTime=(select started from #temp3 where closed=@end)
end
if @end is null
begin
if(select count(1) from #temp3 where dead is null)=0
set @end= (select max(dead) from #temp3)
end
insert into #result (borrower_id,started,ended)
values (@curUser,@minTime,@end)
drop table #temp3
end
--Done with the one user, remove him from temp table and iterate thru to the next user
delete
from #temp1
where borrower_id=@curUser
drop table #temp2
end
drop table #temp1
drop table #example
select * from #result order by started
drop table #result
2. NON-CASCADING - MENGGUNAKAN solusi RECORD TERTUTUP
Mulai dihitung dengan tanggal tutup pertama saat tersedia, kemudian pada tanggal awal paling awal.
select *
into #temp1
from #example
while (select count(1) from #temp1)>0
begin
--Grab only one user's records and place into a temp table to work with
declare @curUser int
set @curUser=(select min(borrower_id) from #temp1)
select *
into #temp2
from #temp1 t1
where t1.borrower_id=@curUser
while(select count(1) from #temp2)>0
begin
--Grab earliest start date and use as basis for 15 day window (#2 rule)
--Use the record as basis for rules 3 and 4
declare @minTime datetime
set @minTime=(select min(started) from #temp2)
declare @curId int
set @curId=(select min(id) from #temp2 where started=@minTime)
select *
into #temp3
from #temp2 t2
where t2.id=@curId
--Remove earliest record from pool of potential records to check rules against
delete
from #temp2
where id=@curId
--Insert all records within 15 days of start date, then remove record from pool
insert into #temp3
select *
from #temp2 t2
where t2.started<=DATEADD(day,15,@minTime)
delete
from #temp2
where started<=DATEADD(day,15,@minTime)
--Insert all records within 15 days of closed, then remove record from pool
insert into #temp3
select *
from #temp2 t2
where t2.closed<=DATEADD(day,15,@minTime)
delete
from #temp2
where closed<=DATEADD(day,15,@minTime)
--Insert all records within 15 days of dead, then remove record from pool
insert into #temp3
select *
from #temp2 t2
where t2.dead<=DATEADD(day,15,@minTime)
delete
from #temp2
where dead<=DATEADD(day,15,@minTime)
--Calculate end time according to rule #3
declare @end datetime
set @end = null
set @end=(select min(closed) from #temp3)
if @end is not null
begin
set @minTime=(select started from #temp3 where closed=@end)
end
if @end is null
begin
if(select count(1) from #temp3 where dead is null)=0
set @end= (select max(dead) from #temp3)
end
insert into #result (borrower_id,started,ended)
values (@curUser,@minTime,@end)
drop table #temp3
end
--Done with the one user, remove him from temp table and iterate thru to the next user
delete
from #temp1
where borrower_id=@curUser
drop table #temp2
end
drop table #temp1
drop table #example
select * from #result
drop table #result
3. NON-CASCADING - MENGGUNAKAN solusi DATE AWAL
Mulai dihitung berdasarkan tanggal paling awal saja.
select *
into #temp1
from #example
while (select count(1) from #temp1)>0
begin
--Grab only one user's records and place into a temp table to work with
declare @curUser int
set @curUser=(select min(borrower_id) from #temp1)
select *
into #temp2
from #temp1 t1
where t1.borrower_id=@curUser
while(select count(1) from #temp2)>0
begin
--Grab earliest start date and use as basis for 15 day window (#2 rule)
--Use the record as basis for rules 3 and 4
declare @minTime datetime
set @minTime=(select min(started) from #temp2)
declare @curId int
set @curId=(select min(id) from #temp2 where started=@minTime)
select *
into #temp3
from #temp2 t2
where t2.id=@curId
--Remove earliest record from pool of potential records to check rules against
delete
from #temp2
where id=@curId
--Insert all records within 15 days of start date, then remove record from pool
insert into #temp3
select *
from #temp2 t2
where t2.started<=DATEADD(day,15,@minTime) or t2.closed<=DATEADD(day,15,@minTime) or t2.dead<=DATEADD(day,15,@minTime)
delete
from #temp2
where started<=DATEADD(day,15,@minTime) or closed<=DATEADD(day,15,@minTime) or dead<=DATEADD(day,15,@minTime)
--Calculate end time according to rule #3
declare @end datetime
set @end = null
set @end=(select min(closed) from #temp3)
if @end is null
begin
if(select count(1) from #temp3 where dead is null)=0
set @end= (select max(dead) from #temp3)
end
insert into #result (borrower_id,started,ended)
values (@curUser,@minTime,@end)
drop table #temp3
end
--Done with the one user, remove him from temp table and itterate thru to the next user
delete
from #temp1
where borrower_id=@curUser
drop table #temp2
end
drop table #temp1
drop table #example
select * from #result
drop table #result
4. CASCADING - MENGGUNAKAN solusi DATE AWAL
Mulai dihitung berdasarkan tanggal paling awal saja.
select *
into #temp1
from #example
while (select count(1) from #temp1)>0
begin
--Grab only one user's records and place into a temp table to work with
declare @curUser int
set @curUser=(select min(borrower_id) from #temp1)
select *
into #temp2
from #temp1 t1
where t1.borrower_id=@curUser
while(select count(1) from #temp2)>0
begin
--Grab earliest start date and use as basis for 15 day window (#2 rule)
--Use the record as basis for rules 3 and 4
declare @minTime datetime
set @minTime=(select min(started) from #temp2)
declare @maxTime datetime
set @maxTime=@minTime
declare @curId int
set @curId=(select min(id) from #temp2 where started=@minTime)
select *
into #temp3
from #temp2 t2
where t2.id=@curId
--Remove earliest record from pool of potential records to check rules against
delete
from #temp2
where id=@curId
--Insert all records within 15 days of start date, then remove record from pool
while (select count(1)
from #temp2 t2
where t2.started<=DATEADD(day,15,@maxTime)
or t2.closed<=DATEADD(day,15,@maxTime)
or t2.dead<=DATEADD(day,15,@maxTime) )>0
begin
insert into #temp3
select *
from #temp2 t2
where t2.started<=DATEADD(day,15,@maxTime) or t2.closed<=DATEADD(day,15,@maxTime) or t2.dead<=DATEADD(day,15,@maxTime)
delete
from #temp2
where started<=DATEADD(day,15,@maxTime) or closed<=DATEADD(day,15,@maxTime) or dead<=DATEADD(day,15,@maxTime)
--set new max time from any column
if (select max(started) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
if (select max(closed) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
if (select max(dead) from #temp3)>@maxTime
set @maxTime=(select max(started) from #temp3)
end
--Calculate end time according to rule #3
declare @end datetime
set @end = null
set @end=(select min(closed) from #temp3)
if @end is null
begin
if(select count(1) from #temp3 where dead is null)=0
set @end= (select max(dead) from #temp3)
end
insert into #result (borrower_id,started,ended)
values (@curUser,@minTime,@end)
drop table #temp3
end
--Done with the one user, remove him from temp table and iterate thru to the next user
delete
from #temp1
where borrower_id=@curUser
drop table #temp2
end
drop table #temp1
drop table #example
select * from #result order by started
drop table #result